| Diet | Herbivore |
| Height | 0.6m |
| Length | 2m |
| Weight | 22 kg |
| Speed | 35 km/h |
| Environment | Land |
| Era | Cretaceous |
| Period | Early Cretaceous |
| Type | Other |
| Location | England |
Hypsilophodon was a small, nimble plant-eating dinosaur that lived during the Early Cretaceous period, approximately 155 to 126 million years ago, in what is now England. This dinosaur has been a subject of scientific debate, as whilst traditionally classified as an early ornithopod, recent research has questioned its exact position within the dinosaur family tree, placing it in an uncertain taxonomic position amongst the ornithischians.
Standing about 60 centimetres tall at the hip and measuring roughly 2 metres in length, Hypsilophodon was built for speed and agility. Its long, slender legs and lightweight build suggest it was an excellent runner, capable of reaching speeds up to 35 kilometres per hour to escape predators. The dinosaur had a relatively large head compared to its body, with large eyes that provided excellent vision for spotting danger.
As a herbivore, Hypsilophodon fed on low-growing plants, ferns, and cycads that were abundant in the warm, humid climate of Early Cretaceous England. Its beak-like front end was perfect for cropping vegetation, whilst rows of small, sharp teeth helped process tough plant material. The dinosaur's hands retained four functional fingers, which may have been used to grasp branches whilst feeding.
Hypsilophodon's fossils have been found exclusively on the Isle of Wight, making it one of England's most famous dinosaurs. Multiple complete skeletons have been discovered, providing scientists with detailed knowledge of its anatomy and lifestyle, though its exact evolutionary relationships continue to be studied and refined.
Hypsilophodon had unusually long, slender legs relative to its body size, making it one of the most gracile dinosaurs known. Its large eyes and relatively big head gave it an alert appearance, whilst its hands retained four functional fingers rather than the reduced number seen in many other plant-eaters.
Hypsilophodon was likely a highly social dinosaur that lived in herds for protection against predators. Its excellent eyesight and incredible speed suggest it relied on early detection and swift escape rather than fighting when threatened. The dinosaur probably spent most of its time foraging close to the ground, using its agile build to navigate through dense vegetation.
Hypsilophodon has appeared in several dinosaur documentaries and children's books about British dinosaurs, though it's less famous in major films compared to larger dinosaurs.
| Phylum | Chordata |
| Class | Ornithischia |
| Genus | Hypsilophodon |
Hypsilophodon was first described by Gideon Mantell in 1849. The original fossils were discovered at Isle of Wight, England.
